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Technical Information
Internal Leak Value
External Leak Value
To configure an external leak:
1
Press External Leak (located under Calibrate With).
2
Press the button to the right of the External Leak Value text.
The data entry pad appears.
3
Enter the leak value and press OK.
For calibration in the E-10 range, the vacuum system must be sufficiently pumped
to reduce helium background below the E-10 range signal level. This is required to
achieve an acceptable signal-to-noise level and ensure accurate calibration.
E-10 range calibration is performed using an external calibrated leak. If an external
calibration is selected soon after system startup, the system evaluates the helium
background and determines if the background signal is sufficiently low to give an
accurate calibration. If the:
System has pumped out sufficiently, the calibration proceeds.
Background is changing, indicating the system is still pumping away
background helium, a countdown timer appears (Figure 32). The system
monitors the helium background and shows the time until the calibration
begins. Should you prefer not to wait, a Cancel button permits the calibration
request to be canceled.
Agilent Helium Leak Detector User Manual
The temperature-compensated internal leak value and
expiration date appear to the right of the Internal Leak
Value text. The actual Internal Leak Value and
Expiration Date can be modified in Section
"Maintenance Screen".
Displays the value on an operational button.
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